Is Multiple 301 Redirections Allowed By Google?

Is multiple 301 Redirections to various subfolders in a site allowed by Google?. I have say, ProductReviews dot com and want to "acquire other people sites that already have existing traffic and backlinks" ... say: printer dot com , microwave dot com and treadmill dot com and do permanent redirections to subfolders in ProductReviews dot com

WHY I WANT TO DO THIS
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- ProductReviews dot com is a new site and "I need to acquire smaller sites that already have existing traffic and backlinks" so that I can get traffic fast
- To gain trust rank from Google fast.

It's hard to say. Theoretically, if google knows those weren't your sites it would only hurt not help. But I'm not sure if the try to figure stuff like that out. They should, if they don't already as it's definitely a way to subvert their algorithm and therefore web spam.

True "multiple redirects" are not handled by ANY user agent, but you are NOT talking about "multiple redirects"

Is multiple 301 Redirections to various subfolders in a site allowed by Google?

that is simply a redirect from URL 'A' to URL 'B' no big deal there, and it doesn't matter whether 1,000,000 URLs redirect to 1,000,000 others or it is just the one URL.Doesn't the fact that you can redirect ALL non-www URL to the www version or vice-versa, of any domain/hostname no matter how many URLs the website has tell you that?

However If you think that redirecting "keyword" domains or subdomains is going to help you are TOTALLY and utterly wrong.

Can this be done?. Will this hurt or help the SEO of ProductReviews dot com ?

Neither.But redirecting the visitor traffic could, or will produce conversions.

- ProductReviews dot com is a new site and "I need to acquire smaller sites that already have existing traffic and backlinks" so that I can get traffic fast- To gain trust rank from Google fast.